Classification and management of Coats' disease

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This article presents two cases of a progressive form of Coats' disease which were detected by local optometrists and successfully treated by ophthalmologists. Coats' disease is an exudative vasculopathy characterised by the presence of dilated retinal blood vessels (telangiectasia), micro-aneurysm formation, retinal exudation and exudative retinal detachment.

The disease manifests unilaterally in 80 to 90 per cent of cases, without evidence of racial or familial predilection.1 Bilateral asymmetrical involvement may also take place in rare occasions. Therefore, long-term follow up of the least affected eye is necessary so late complications can be identified earlier and treated to prevent visual loss.2